The microscope usually used for seeing living cells or tissues is
compound microscope
electron micrscope
phase contrast microscope
light microscope.
C.
phase contrast microscope
Phase contrast microscope was developed by Zemicke (1935, Nobel Prize 1953) to observe living cells and the events occurring in them (e.g., Spindle formation, movement of chromosomes, endocytosis, exocytosis). It is similar to optical microscope except that it has an annular diaphragm in the condenser and a transparent phase plate at the back focal plane of objective. The microscope converts differences in refractive indices into differences in brightness.
Which of the following is correct regarding respiration in adult frog
In water- Skin, gills
On land - Skin, buccal cavity
In water- Skin, buccal cavity
On land- Skin, lungs, gills
Which of the following is correctly matched
Monstera- Fibrous root
Dahlin- Fasciculated root
Azadirachta- Adventitious root
Basil- Prop roots
Deuteromycetes are known as fungi imperfecti because
their zygote undergoes meroblastic and holoblastic cleavage
only asexual stages are known
they have aseptate myceliun
they are autotrophic
Abscisic acid is known as the stress hormone because it
breaks seed dormancy
induces flowering
promotes leaf fall
promotes closure of stomata
One of the world's most poisonous fish toxins is released by
clown fish
eel fish
sword fish
puffer fish
Photorespiration shows formation of
sugar but not ATP
ATP but not sugar
both ATP and sugar
neither ATP nor sugar
Which of the following is correctly labelled
A: Reissner's membrane
B: Scala vestibuli
C : Basilar membrane
D: Tectorial membrane
